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    • 5. 发明授权
    • Terminal-blocked isocyanate prepolymer having oxadiazine ring, process for producing the same, and composition for surface-coating material
    • 具有恶二嗪环的端基封端的异氰酸酯预聚物,其制备方法和表面涂层材料的组合物
    • US06710151B2
    • 2004-03-23
    • US10275901
    • 2002-11-12
    • Toshiaki KuwatsukaHideaki OgataManabu ShimodaRyuuji HaseyamaIzumi Mega
    • Toshiaki KuwatsukaHideaki OgataManabu ShimodaRyuuji HaseyamaIzumi Mega
    • C08G1879
    • C08G18/79C08G18/7887C08G18/8016C08G18/8064C08G2150/20
    • The end-blocked isocyanate prepolymer having an oxadiazine ring according to the present invention is characterized in that at least one of isocyanate groups of a NCO-terminated isocyanate prepolymer, which has NCO groups at the ends and comprises units derived from an oxadiazinetrione compound (A) represented by the following formula (1) and units derived from an active hydrogen compound (B) represented by the following formula (2), is blocked with a unit derived from an end-blocking agent (C) having at least one active hydrogen in one molecule, and that the end-blocked isocyanate prepolymer has a softening point of not lower than 50° C., wherein R1 is a group selected from the group consisting of an aliphatic hydrocarbon group of 2 to 20 carbon atoms, an aliphatic hydrocarbon group having an aromatic group and an alicyclic hydrocarbon group, and n is an integer of 1 or greater, H—A—R2—A—H  (2) wherein R2 is a straight-chain, branched or cyclic alkylene group of 2 to 12 carbon atoms, and A is any one of an oxygen atom, a sulfur atom, a N—R′ group (R′ is a hydrogen atom, an alkyl group, an aryl group or an aralkyl group) and a COO group.
    • 根据本发明的具有恶二嗪环的封端异氰酸酯预聚物的特征在于,末端具有NCO基团的NCO封端的异氰酸酯预聚物的异氰酸酯基团中的至少一个并且包含衍生自恶二嗪三酮化合物(A )和由下式(2)表示的活性氢化合物(B)衍生的单元被源自具有至少一个活性氢的封端剂(C)的单元封闭 并且封端的异氰酸酯预聚物的软化点不低于50℃,其中R 1是选自2至20个碳原子的脂族烃基,脂族烃 具有芳基和脂环族烃基的基团,n为1以上的整数,其中,R 2为2〜12个碳原子的直链状,支链状或环状的亚烷基,A为任意的 的氧原子,硫原子,N-R'基(R'是氢原子,烷基,芳基或芳烷基)和COO基。